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Science 7 April 1967:
Vol. 156. no. 3771, pp. 88 - 90
DOI: 10.1126/science.156.3771.88
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Articles

Growth and Sporulation of a Pyrimidine Spore Color Mutant of Sordaria fimicola

Arif S. El-Ani 1

1 Division of Laboratories and Research, New York State Department of Health, Albany

A nonautonomous spore color mutant of Sordaria fimicola is a pyrimidine auxotroph that produces hyaline nonviable ascospores. Uracil, uridine, and cytidine are more effective growth factors than cytosine and thymine and, in high concentrations, render the mutant self-fertile by inducing the ascospores to resume development and maturation. Crosses with the unlinked arginine non-autonomus spore color mutant st-59 yielded the double mutant st-59 pyr that requires both arginine and a pyrimidine for growth, which indicates a lack of suppression of the pyrimidine requirement by the arginine locus.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)